Quote:
Originally Posted by astronobob
Hiya Astro-liano's
The Rho Ophiuchus Nebula Complex (IC4604) and the surrounding area is one of the most interesting and beautiful areas in the entire sky.
Featuring the bright star Antares, the Ophiuchi Triple Star and surrounding IC4604 Reflection Nebula, M4 Globular Cluster,
and the smaller NGC 6144 Globular Cluster, as well as various dark nebula, this area holds something of interest for any astronomer.
The beautiful blue IC 4604 reflection nebula surrounding the Rho Ophiuchi Triple Star is one of the standout features in this area.
It is a result of interstellar dust that is illuminated by nearby stars. The red areas of this image are emission nebulae that are created
by hydrogen gas emitting light. The dark nebula is thick dust clouds which obscure background stars.
The giant red-giant star Antares dominates the image and is surrounded by subtle and unusual yellow reflection nebulosity.
Antares is approximately 700 times larger and 9000 more luminous than our Sun.
I am really happy with this eye catching target, had to look at it again on my phone half way through a casual days work, ha ha !
So, Image stats are 15 x 150sec/2.5min Raws - 32bit Tiff - 16bitTiff - 8bit tiff then Jaypegged ! Processing after each Convert ?
Lens : Canon 70-200 'L' @ 70mm, F2.8, might add that could need stopping down as the stars at
top right & right are flared with a 1970's influence ? or lens may be out of collimation ? ?
Equipment was : Neq6p on Pier, SW ED80 Guide Phd, sided with Lens on a 600D with ICNR
Sky conditions : Nil moon, Transparency 8, Seeing 6, Temp 4degs @ Leyburn & worth every minute 
Sorry for the small file, as big as can go attach, PhotoBucket is not great unless pay $$ ? may look into it ! Cheers ! |
Very nice image Bob, excellent framing and very saturated. Perhaps a bit too contrasted but it is difficult to say considering the relative small size.
About a place to upload your astroimages at larger resolution for free perhaps you could find a solution here:
http://www.astrobin.com/
Clear skies
Marco